Related Questions

For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as
A 4.5 to 6.0
B 6.5 to 8.0
C 8.5 to 10.0
D 10.5 to 12.0
The gas from sludge digestion tank is mainly composed of
A Nitrogen
B Carbon dioxide
C Hydrogen sulphide
D Methane
In normal conditions, the period for sludge digestion, is
A 10 days
B 20 days
C 30 days
D 60 days
The principal gas evolved from sludge digestion tank is
A CO
B CO2
C CH4
D N2
For normal sludge, the value of sludge index for Indian conditions is
A 0 to 50
B 50 to 150
C 150 to 350
D 350 to 500
If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called
A Balanced beam
B Under reinforced beam
C Over reinforced beam
D None of the above
In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when
A There is no load on the generator
B The generator runs on full load
C The generator runs on overload
D The generator runs on designed speed
In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.
A Same as
B Less than
C Greater than
D None of these
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will
A Increase
B Decrease
C Remain unaffected
D Other factors control it
pH value of sludge during alkaline regression stage, is
A More than 7
B Less than 7
C Less than 6
D More than 6

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